Vibration simulation of a simply-supported beam with attached multiple absorbers
In general, the standard solutions to reduce the vibration and noise problems are to redesign and modify the system such as adding the thickness of wall panels, enhancing the elasticity of the structure and increase the damping mechanism of the structure. In this study, the concept of dynamic vibrat...
Saved in:
| Main Author: | |
|---|---|
| Format: | Thesis |
| Published: |
2015
|
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/7544/ http://eprints.uthm.edu.my/7544/1/MOHD_AZLI_BIN_IDRIS.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | In general, the standard solutions to reduce the vibration and noise problems are to
redesign and modify the system such as adding the thickness of wall panels, enhancing
the elasticity of the structure and increase the damping mechanism of the structure. In
this study, the concept of dynamic vibration absorber is used on a beam structure to reduce
the vibration or amplitude. The methods employed in this study were analytical
equations and finite element analysis. MATLAB® was used to transform analytical
equations into graphs and at the same time to verify the finite element simulation of
ANSYS®. Result shows that analytical equation and finite element simulation of a
simply supported beam produce a similar outcome, which indicates a good agreement.
The frequency range was studied between 5 Hz to 1000 Hz and there are four modes
resulting shape. Further study was conducted by placing the absorber at different locations
configuration. This was followed by adding a single absorber and multiple
absorbers to see the average percentage reduction in vibration’s amplitude. The overall
reduction achieved for multiple absorbers is 88.6% compared to a single absorber
which only achieved 8.21% reduction. Finally, it can be concluded that multiple vibration
absorber can be reduce the global vibration of structure compared to a single
vibration absorber. However, for the structures that concern about weight, adding more
dynamic vibration absorber needs to be considered properly since excess weight will
result in less fuel efficiency of vehicles, aerospace, automotive and machine systems. |
|---|